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Created 29-Apr-10
Modified 4-May-10
Visitors 170
15 photos
Photo gallery from 3 day visit to the Grand Coulee (Upper and Lower) and Moses Coulee (10 miles west of Grand Coulee).

This is a companion gallery to the Ice Age Floods gallery.

Moses Coulee was the first of the two coulees formed by outflow from ancient Lake Columbia (into which the Lake Missoula floods emptied). It was used only for a short while (geologically speaking) before an ice lobe sealed it. Then the Grand Coulee was used for a longer while.

It has been 13,000 years since water flowed through Grand Coulee and even longer since it flowed through Moses Coulee. Neither coulee has a river or stream running through it now.

It is really fun to let your imagination go here. Imagine a flood so big that Grand Coulee overflowed - by a lot, not just a little - to the tune of several hundred feet over the top for miles and miles in width (hundreds of miles if my reading is accurate).

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It is dry hereNot too far from where Moses Coulee encounters the current Columbia River.Neat columnar basalt!How is all that held up by those columns?Looks like a movie set!A big river ran through itIs this dry wheat farming?Dry wheatLooks tropicalThe cause of its name is obviousReflectionsSteamboat rock.The view upstreamThe view downstreamCan you count them?